耐高温、内刚性、外柔性水基钻井液封堵剂的研制与性能评价

IF 4.2 Q2 ENERGY & FUELS
Zhe Xu , Jinsheng Sun , Li Li , Kaihe Lv , Jingping Liu , Zhiwen Dai , Xianfa Zhang , Zonglun Wang
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引用次数: 5

摘要

在油气开采的钻井过程中,大量钻井液侵入地层,造成严重的地层破坏和井筒坍塌,严重阻碍了深层油气的高效开采。尽管近年来已经开发了几种用于高效裂缝密封的堵剂,但开发具有自适应能力和耐高温性能的高性能堵剂仍然是一个挑战。本文报道了以纳米二氧化硅为刚性核,聚(丙烯酰胺-co-N-乙烯基吡咯烷酮)为柔性壳,通过反相乳液聚合合成内刚性和外柔性堵剂PANS。该堵剂的中粒径为10.5μm,可自适应封堵地层中的微裂缝和裂缝,有效降低膨润土水基钻井液在低温低压和高温高压条件下的过滤损失。此外,与纯纳米二氧化硅(500 nm)相比,在180°C下热轧后,PANS对100–120目砂床的密封效率提高了71.4%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development and performance evaluation of a high temperature resistant, internal rigid, and external flexible plugging agent for water-based drilling fluids

During the drilling process for oil and gas production, a larger number of drilling fluids invade the formation, causing severe formation damage and wellbore collapsing, which seriously hinders the efficient production of deep oil and gas. Although several plugging agents have been developed for efficient fracture sealing in recent years, the development of high-performance plugging agents with self-adaptive ability and high-temperature resistance remain a challenge. Herein, we report the synthesis of an internal rigid and external flexible plugging agent PANS by reversed-phase emulsion polymerization with nano-silica as the rigid core and poly (acrylamide-co-N-vinylpyrrolidone) as a flexible shell. The plugging agent has a median particle size of 10.5 μm and can self-adapt to seal the microfractures and fractures in the formation, leading to an effective reduction in the filtration loss of bentonite water-based drilling fluid under both low temperature and low pressure (LTLP) and high temperature and high pressure (HTHP) conditions. In addition, compared with the neat nano-silica (500 nm), the sealing efficiency of PANS toward 100–120 mesh sand bed was increased by 71.4% after hot rolling at 180°C.

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来源期刊
Petroleum
Petroleum Earth and Planetary Sciences-Geology
CiteScore
9.20
自引率
0.00%
发文量
76
审稿时长
124 days
期刊介绍: Examples of appropriate topical areas that will be considered include the following: 1.comprehensive research on oil and gas reservoir (reservoir geology): -geological basis of oil and gas reservoirs -reservoir geochemistry -reservoir formation mechanism -reservoir identification methods and techniques 2.kinetics of oil and gas basins and analyses of potential oil and gas resources: -fine description factors of hydrocarbon accumulation -mechanism analysis on recovery and dynamic accumulation process -relationship between accumulation factors and the accumulation process -analysis of oil and gas potential resource 3.theories and methods for complex reservoir geophysical prospecting: -geophysical basis of deep geologic structures and background of hydrocarbon occurrence -geophysical prediction of deep and complex reservoirs -physical test analyses and numerical simulations of reservoir rocks -anisotropic medium seismic imaging theory and new technology for multiwave seismic exploration -o theories and methods for reservoir fluid geophysical identification and prediction 4.theories, methods, technology, and design for complex reservoir development: -reservoir percolation theory and application technology -field development theories and methods -theory and technology for enhancing recovery efficiency 5.working liquid for oil and gas wells and reservoir protection technology: -working chemicals and mechanics for oil and gas wells -reservoir protection technology 6.new techniques and technologies for oil and gas drilling and production: -under-balanced drilling/gas drilling -special-track well drilling -cementing and completion of oil and gas wells -engineering safety applications for oil and gas wells -new technology of fracture acidizing
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